Writing-machine.



PATENTED JUNE 30, 1908.

r F. F. MAIN. WRITING MACHINE.

APPLICATION I'ILED JULY 1,190!

INVENTOR.

WITNESSES ITE sa ar es earner series.

FRED F. MAIN, OF COLUMBUS, OHIO.

WRITING-LIACHINE Specification of Letters Patent. Application filed 3111 71, 1907. Serial No. sense.

Patented June 30, .1998.

To all whom it may ctr/teem:v

Be it known that I, FRED F. MAIN, a citizen of the United States, residing at (plumbus, iii the county of Franklin and State of Ohio, have invented certain new and useful Improvements in VVriting-Machines, of which the following'is a specification.

The object of my invention 18 to return the carriage to the beginnlng of a new line, from any point of its travel, with no greater cxpend1ture of force than is required to,press any other key.

The action of the several parts will be easily understood from the sim le drawin attached to and forming a part this specification. 1 v

Figure 1 showsthe top and corner of'a *typewriterwith my invention ap lied. Fig. 2 shows the-o crating position 0 the threelever 3 is a flexible cord 4, which passes over grooved wheel 1, down the side of the machine below the table or. desk, and 1S eon nected to a piston 7, fittingcylinder 6. The

piston is held normally at the top of the larly connected.

cylinder 6 by along, coiled s ring attached to bracket '2 and iston 7. his leaves the flexible cord 4 sladlr, and the carriage free to make any of its normal movements.

4 Iron core 9 is suspended by a spring 10 in up or part of solenoid 8 and is connected to Va ve operating lever 17 by flexible cord 11. Iron core 13, spring 14, flexible cord 15, valve operating lever 16 and solenoid 12. are snn1- Valve I8 is a simple threeway valve with lever operating arm 16, 17 bent as shown'. connc'ctcdto core 2) by flexible cord 1 1. Arm l6 is connected to core 13 by flexible cord 15. Air-tight connection is made by pi )e 20 from bottom ofcylindcr (i to valve in, l y pipe 2'! from valvi lhf to air-exhausted rh'am )cr 213.

' Solenoid S is connected with source of electricity 23 and circuit closing key 24, which Ann I7 as before stated is source of electricity 23 and to circuit closing means 2?. and 29.

An extension. 28 of conduit-tin inaterialis placed on the carriage and re 29 of con ducting material, suitably supported, is so placed in reference to extension that the torward movement of the carriage necessary to engage, the esca cment, after the re-- turn of the carriage, wi break the electrical connection between extension 28 and ,rod 29.

In the mechanical operation of valve 18, a key and plunger 31 is suitably placed and pivoted to arm 17. Arm 16. is connected to spring 32 which holds the valveoperating.

lever in normal position as shown in Fig. 3. The operation ofmy device 15 as follows: key 24 is depressed w ienever it IS desired to have the carriage returned to the beginning of the-line, this closes the circuit between Solenoid and source of electricity 23 thus energizing solenoid 8, whose core Qis quickly drawn into it, giving a sudden jerk to the valve operating lever 17 which opens the valve as shown in Fig. 2, so that the air from c linder 6 may rush into the exhausted cln nhor th of 1: attached cord 1 passing over pulley 1 to the carriage return lever 3, uickl returns the carriage to the beginnmg oi the new line at the same time advancing the paper. When key 2+1 is released the solenoid 8 ceases to attract its core U, which is quickly returned by spring 10, leaving cord 11 in a slack position as in Fig. 2.

\Vhcn the carriage makes the full return movement the extension 1h makes contact .18 connects cylinder (3, throu h pipe 20, to

outside air at vonl Ill Fig. l. l iston 7 is thus instantly released and returned by spring 5 totho l-op of cylinder c so that it is no hindrance to the movements ol the carriage. The small lorward movement of any carriage when lil'nlljilli. lully bomb, until the est-apemcnt lakes the strain, is sullirIcnl lo break the conlarl luiuooll extension in and rod Bl).

.l wish it dislinrllr understood lhal l do not coniinc mysoll' lo Llllll'h'ill means only for operating the rulrc, but also usc'n directconnectcd nnrclmuical means as shown in This quickly draws piston 7..to ettom of the cylinder 6 and by means Fig. 3. The key 31 is depressed and held till the carria e has returned to the required position, W en spring 32 closes the valve and opens vent 19. The key whether directly connected or used to control electrical devices may be placed upon the typewriter, typewriter stand or on the floor to be touched by the 0 erators foot. I

What, claim and desire to secure by Letters Patent is:

1. In combination with a typewriter and the carriage thereof, having a line spacing lever, a cylinder having an open outer end, a piston in the cylinder, a s ring for su porting said iston extending t ough sai open end of t e cylinder, a connectlon between said piston and said lever also extending through said open end of the cylinder, a chamber having a vacuum maintained therein, a connection between the lower end of said cylinder and said chamber, a valve in said last named connection and means for operating said valve whereby when in one position it establishes communication between said chamber and cylinder and when in another position it closes said communication between the chamber and cylinder.

2. In combination with a typewriter and the carriage thereof having a'li'ne spacing lever, a chamber having a vacuum maintained therein, a piston cylinderfii aisprmg supported piston in said cylinder, means for connecting said piston and lever, a pipe connection between said chamber and the base of the cylinder, a valve in said pipe to establish and cut off communication between said cylinder and piston, oppositely disposed arms carried bysaid valve, and means connected to each arm-"for operating the same in opposite directions.

3. In combination with a typewriter and the carria e thereof having a line spacing lever, a chamber having a vacuum maintained therein, a piston cylinder, a spring supported piston in said cylinder, means for i connecting said piston and lever, a pipe COH- nection between said chamber and the base of the cylinder, a valve in said pipe to establish and cut on. communication between. said 

